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    <title>Document</title>
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    <script>
        
      function countDown(time){
      var nowTime = +new Date(); //返回当前时间的总毫秒数
      var inputTime = +new Date(time);//返回的是用户输入时间总的毫秒数
      var times = (inputTime - nowTime)/1000;  //time是剩余时间总的秒数  一秒等于1000毫秒
      var d = parseInt(times / 60 / 60 /24); //天
      d=d<10?'0'+d:d;
      var h = parseInt(times / 60 /60 %24);//时
      h=h<10?'0'+h:h;
      var m = parseInt(times / 60 % 60);//分
      m=m<10?'0'+m:m;
      var s = parseInt(times % 60);//当前的秒
      s=s<10?'0'+s:s;
      return d + '天' + h +'时'+ m + '分' + s + '秒';
   }

   setInterval(function(){
    console.clear();
    console.log(countDown('2022-11-11 00:00:00'));

   } ,1000);


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